Roof-truss construction.



l. G. STADELMAN, 'aoor muss corasmucnou.

APPLICATION FILED OCT. 29. I91].

Patented Sept. 3

: "cums PEYERS co. "mm-urban. WASHIrlaIgN. n. c.

TE STAT JOSEPH G. STADELMAN, OF CHICAGO, ILLINOIS.

Fries.

BOOF-TRUSS CONSTRUCTION.

Application filed. October 29, 1917. SerialNo. 199,208.

To all whom it may concern:

Be it known that I, JOSEPH G. STADEL- MAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Roof-Truss Construction, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My improved truss is particularly intended for use in portable or sectional buildings, such as are illustrated in my copending applications Serial Nos. 85,825 filed March 25, 1916, andl76,468 filed June 23, 1917.

The truss members illustrated in these applications were secured to the wall plates of the building by providing both the truss member and the wall plate with bonding notches, whichwere adapted to interlock the truss members to the wall plates.

This construction has the advantage of quick assemblage and disassemblage of these parts which is very important in a portable house where facility and rapidity of erection are essential, but the operation of cutting the notch in the truss member was quite laborious and weakened the truss considerably. The wall plate has no large stresses to resist, and can well withstand such notching but the notch in the truss member occurred directly at the point of support of the truss, and resulted in a weakness where the shearing forcewas largest.

In the present embodiment I dispense with the notch in the truss member and obtain a stronger truss with a saving of labor, without sacrificing the facilityof assembly and disassembly inherent in the former method. This is fully explained in the following specification, taken in connection with the ac companying drawing, in which Figure 1 1s a fragmentary elevational View of my improved roof truss;

sections, with transverse cross rails 3-serv ing to tie the boards together. A wall plate member 4 is arranged to seat 'astride the tops of the panel sections, agroove 5 therein receiving the tops of the siding boards, the inner beam 6 of the wall platemember resting upon the upper cross rails 3 of the contigous panel sections 1. The wall plate member 1 is secured to the panel sections 1 by either bolts or nails 7. The present invention is not directly concerned with the erection of the siding panels and wall plates and for a detailed description thereof, attention is directed to the applications previously referred to.

The truss member. designated 10 -in its entirety, comprises a tie-beam 11, the king posts 12, the inclined rafters 13, and the truss plates 14. The tie-beam extends from side to side of the house for bracing the walls and for supporting the king posts 12. The latter are nailed upon the sides of the tie-beam l1 and rafters 13 as are the reinforcing truss plates 11, The rafter 13 inclines downwardly and is secured by bolts 15 or by nails to the oblique edge of the tiebeam 11. The heads of thebolts 15 are countersunk in the rafter 13 to afiord, a smooth upper surface for supporting the roof panels 16. p v

The wall plate member 4 is, provided with oblique notches 17 for the reception of the inclined rafter 13, shown in superposed re lation in Fig. 2. The notch 17 is out very sl1allow,'its only function being to prevent lateral movement of the roof truss 10. The tie-beam 11 has a squared shoulder portion 11 projecting slightly below the rafter 13 and this shoulder portion forms an abutment bearing against the inner face of the wall plate member 4 to prevent inward collapse of the siding or to prevent movement of the roof truss in that direction. The rafter 13 extends out beyond the wall plate member 4 and supports roof sections 16 which form eaves on the building. To the underside of the extending portion of the rafter 13 is secured a block or bracket member 18 which forms an abutment for engaging the outer face of the wall plate member 4 for preventing outward collapse of the siding 1 or movement of the roof truss. The block or bracket member 18 is preferably given an ornamental configuration to enhance the appearance of the caves.

The shoulder 11' of the tie-beam 11 and the block 18 constitute a built-up notch and perform the same function that the bonding notch did in my previous trusses, but do not weaken the truss. v

A wrought iron strap 20 is bolted to the cross rails 3, the wall plate member 4% and tothej rafter 13'to tie the truss 10 to the siding of the building. This is the preferred means of connection between the roof and siding, though other suitable connecting means-may be employed.

In the modification illustrated in Fig. 4:, two parallel rafters 2121 are employed. At the ridgeof the truss therafters 2121 are fastened upon opposite sides of'a-single king post,not shown, and at the eaves of the truss the rafters arefastened upon opposite sides of the tie-beam 11. The tie-beam 11 rafters- 21-21 has the projecting shoulder 11, similar to the construction of Fig. 1.

The oblique notch 17 is made considerably wider for the reception of both rafters 2121. In this embodiment the block or bracket member 18 comprises-either a single block of a breadth suflicient to'span both (Fig. 1), or comprises two narrow blocks1818, (Fig. 8) to be secured under individual rafters 2121.

Copies of this patent may beobtained for The outer board 25 of the wall plate member 1 extends up into engagement with the roof panels 16, as shown in dotted lines in Fig. l, and closes off the space between the roof panels and wall plate.

From the foregoing it will be apparent that the erection of my improved truss can be accomplishedwith ease and rapidity, and when once in place it is securely held against movement in any direction,

The oblique notch 17 prevents lateral movement ofthe truss, the shoulder 11' and the bracket member 18 prevent longitudinal movement of the truss, and the strap 20 prevents vertical lifting of the truss under the action of a high-wind.

Other modifications will immediately appear to those skilled in the art, but I intend these to come within the spirit and scope of the appended claim.

What I claim is:

A portable building construction comprising a roof truss constructed of rafters of substantially uniform depth, approximately the shoulders opposed to the ends of the tie beam to engage the outer sides of said plates.

In witness whereof, I hereunto subscribe my name this26 day of October, A. D. 1917.

JOSEPH G. STADELMAN.

five cents each, by addressing the Commissioner of Patents Washington, D. 0'. 

